I'm sure this has been posted before but I'm new so give me a break. The only person close to me that knows I'm bi is my gf. She knows the whole past with the situation. We are in a very serious relationship with engagement in the next 1-2 years. She has even offered to participate in a MMF with another bi guy to see what it's like, pending she chose the other guy. But she doesn't want me messing around with other guys, even if I tell her in advance. I can understand her reasoning but it's still frustrating.